Snap-flask.



Wjlnsses.

H. GUBLEY.

' SNAP PLASK.

APPLICATION FILED MAR. 20, 1911.

Patented July 1, 1913.

3 SHEETS-SHEET 2.

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I J Whiz/Z01" LOLUMBIA PLANOGRAPM (IQ-WASHINGTON. u. c.

H. GUBLEY.

SNAP FLASK.

APPLICATION FILED MAR. 20, 1911, 1,065,921. Patented July 1, 1913.

3 SHEETS-SHEET 3.

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:OLUMBM PLANOGRAPHxCQ. WASVHINGTON, b. c'.

UNITED STATES PATNT T nnin.

HAROLD CUBLEY, 0F WALSALL, ENGLAND, ASSIGNOR TO MATTHEW HARVEY AND COMPANY LIMITED, OF WALSALL, ENGLAND, A CORPORATION OF ENGLAND.

SNAP-FLASK.

Specification of Letters Patent.

Application filed March 20, 1911.

Patented July 1, 1913.

Serial No. 615,755.

To all whom it may concern Be it known that I, HAROLD CUBLEY, a subjec-t of His Majesty the King of Great Britain and Ireland, residing at 55 Bath road, lValsall, in the county of Stafford, England, pattern-maker, have invented new and useful Improvements in Snap-Flasks, of which the following is a specification.

This invention consists of the herein de scribed improvements in and Connected with snap flasks for forming sand molds for east ing. iHeretofore when sand molds were formed in snap flasks such molds have always been poured with the parting between the top and bottom molds horizontal as these molds could not be poured side wise or endwise because the top and bottom molds were liable to slip one upon another at the parting.

The object of this invention is to so construct and arrange a snap flask and its top and bottom boards thatwhen the surrounding parts of the flask have been removed from the mold and top and bottom boards. the two parts of the mold will be locked together and there will be no possibility of their slipping on one another at the parting, thus enabling the mold to be poured endwise or sidewise :as may be desired, and enabling light castings to be made in these molds with about fifty per cent.

less ridges and gates than would be required if the snap flask mold had been made for pouring with the parting between the two molds horizontal as is usual.

The important feature of this invention is that I employ with the pattern support and with the top and bottom press boards and the surrounding parts of the flask a light rectangular metal frame made with projections at each of its four corners and so arranged that after the surrounding parts of the snap flask that is the parts which are technically known as the drag side and cope side have been removed from the finished mold, this frame, which is situated between the two press boards, remains in position around the finished mold with its four corner projections projecting across the parting of the two half molds and engaging with the corners of the same so that when the two half molds and their press boards are clamped together as is usual, the two half molds cannot slip out of position with one another and thus the mold can be poured on edge endwise or sidewise as aforesaid.

I will describe my invention by referring to the accompanying drawings on which Figure 1 is a perspective view of the top board of a snap flask constructed in accordance with this invention; Fig. 2 is a sectional side elevation of part of the same ta-kenon line X X of Fig. 1; Fig. 8 is a perspective view of a pattern support constructed in accordance with this invention for use with my improved snap flask, this view showing two sprays of patterns lying in the depressions in the odd side; Fig. 4: is a perspective view partly in section showing the drag side of the surrounding part of :the snap flask in position on the pattern support withthe sand rammed in'and pressed b the top press board; Fig. 5 is a perspective view of the snap flask partly in section showing the flask turned over from the position represented in Fig. 4 with the top press board at the bottom and with the cope side of the surrounding part of the snap flask in position on'the drag sideand with the other press board pressed on the sand forming the mold; Fig. 6 shows the mold completed with the cope side and drag side parts of the snap flask removed and with the press boards and mold clamped together by an ordinary clamp ready to be turned up sidewise for pouring; Fig. 7 is a cross sectional elevation taken on line Y Y of Fig. 6 but not showing the clamp; Fig. 8 is a cross sectional elevation of one side of the two surrounding parts of the flask and the end of the stem of the spray in position; Fig. 9 is a perspective view of a modified form of the said metal frame which is used in the snap flask according to this invention; Fig. 10 is a perspective view partly in section showing the odd side with the said metal frame and drag side thereon together with the top press board pressing the sand mold 011 to the odd side; Fig. 11 shows the two half molds in position with the frame illustrated in Figs. 9 and 10 clamped together by the top and bottom press boards and the clamp ready to be turned up sidewise for pouring, and Fig. 12 is a cross sectional side elevation taken on line Z Z of Fig. 11.

I will first describe the arrangement of my invention as illustrated by Figs. 1 to 8 inclusive. In this arrangement of my inven tion the said light metal frame is marked a and it is fixed to the mold face of the top press board Z) of the snap flask, the said frame being by preference of malleable cast iron angle section and fixed to the board by screws so as to be about flush with the edges of the same as shown in Figs. 1 and 2. This frame a. has at each of its four corners an angle section projection c which projects at right angles from the face of the press board Z) and is made long enough from that face to extend across the parting (Z of the two half molds c, f. In each of the inside corners of the frame of the pattern support 9 which has the depressions for the sprays of patterns It (two sprays of which are shown in Fig. there is a recess 71 of the proper size for the corner projections c to enter and these corner recesses i can conveniently be formed in the pattern support frame by fixing across each corner a plate such as 2' in Fig. 3.

The ends h of the ridges of the sprays of pattern 71. on the pattern support q are shaped so as to reach beyond the outside of the pattern support 9 of the flask at the pouring holes. The two surrounding parts of the snap flask, technically known as the drag side and the cope side are of the usual construction as is also the other press board is, that is to say, the drag side of the surrounding part of the snap flask consists of the four surrounding boards Z Z Z Z hinged together at Z, and made with a catch or fastening E at the corner opposite to the hinge Z the frame being of the proper size to fit around the press board h and on the top of the frame of the pattern sup port g. The cope side portion of the surrounding part of the snap flask is of similar construction to the drag side and consists of the four boards m m m m similarly fastened by a catch or fastening, the drag side having the usual two upwardly projecting end guide stems one at each end, only one can be seen on my drawings, and this is marked a the cope side having fixed at each end the usual metal loop or bracket 0 with which the stem it engages to keep the two parts of the snap flask in correct position relatively to one another.

The snap flask and odd side with my in vention applied thereto as above described are used as follows :The drag side part Z Z Z Z of the flask is first placed in position on the pattern supportand sand to form the half mold f is placed therein and then the top press board Z) is placed in position on the sand with its corner projections 0 projecting down the corners of the drag side and now when this has been pressed, the press board 6 passes down into the drag side and the corner projections 0 enter the corner recesses 2' in the pattern support 9 as shown in Fig. 41-. The parts as shown in Fig. r are now turned over so that the press board Z) is at the bottom with the pattern support g at the top, which is now removed leaving the pattern .in the half mold The cope side m m m m of the flask is now placed in position on the drag side Z Z Z Z as in Fig. 5 so that the upper ends of the corner projections 0 enter the corners of the cope side m m m ou of the fiask. The sand is now filled in to form the cope side of the mold and the other press board Z", is now placed in position on the sand and pressed into the cope side m", m m m of the flask. After the patterns have been rapped the cope side of the mold e is lifted off the drag side half mold f to enable-the pattern to be removed and the cope side is then replaced on the drag side part f of the mold. The drag side and the cope side parts of the flask are now removed and the two half molds e, f with the press boards Z), are clamped together as by the clamps 7) (see Fig. 6) and now the half molds e,'f are effectually prevented from slipping on one another by the corner projections c of the frame a embracing the four corners of the mold across the parting (Z as in Fig. 6, thus the mold in this form can stand on either of its ends or sides for the metal to be poured in at the pouring holes as aforesaid. These sides of the drag and cope parts of the surrounding part of the flask through holes in which the enlarged ends ofthe spray 7L project to the inner faces of the surrounding part of the flask as would be the case if these recesses 72,2 were not made.

Instead of the metal frame with its corner projections being fixed to one of the press boards as in the arrangement above described with reference to Figs. 1 to 8, the said metal frame is in a modification of this invention so constructed as not to be fixed to the press board, but is separate therefrom and is so arranged and adapted for use that when the drag side and cope side portions of the flask have been removed from the finished half molds, the said metal frame will be situated at the parting of the two half molds and overlap the same and the corners of the molds will be embraced by the said corner projections of the frame as aforesaid to prevent the two halves of the mold from slipping out of position with one another when they are clamped together for pouring edgewise or on one or other of its ends. This modification of my invention is particularly useful when the pattern which is being molded is of such a size or character that the depression forming the mold sand thus breaking away when the casting is being pour-ed is obviated. In the said modification of my invention the rectangular metal framein this case marked a (see Fig; 9) is by preference made of somewhat of T-shape in cross section with a vertical flange a ofthe proper rectangular shape and size to fit inside the drag side Z Z Z Z and the cope side m m m m of theflask and with a horizontal flange a to fit between the saiddr-ag side'and cope side parts of the flask, the said frame being made with any suitable number of arched shaped openings by being arched at a as in Fig. 9' corresponding with the pouring holes ofthe mold. The said frame is by preference made with two of these arched openings a on one of its long sides and with three of these arched openings a on the other side and two openingsn on one of its ends so that it can thus be used with various sprays of patterns on the odd side as may be required. The said frame is as aforesaid made with corner projections c projecting above and below the horizontal flange a so as to embrace the corners of the mold as aforesaid. In using this loose frame a it is first placed on the pattern support 9 as in Fig. 10 with its four corner projections 0 passing down into the corner recesses or holes 2' in the pattern support and with the lower portion of the vertical flange a of the frame passing down into a recess or groove 9 which is formed all around the interior of the pattern support 9 just within its frame as indicated by dotted lines in Fig. 3 so that the horizontal flange a of the frame now rests, on the top of the pattern support frame 9 asin Fig. 10. The drag side Z Z Z Z part of the flask is now placed in position around the part of the flange a which projects upwardly above the horizontal flange (4 this drag side part Z Z Z 1 of the flask resting on the horizontal flange a as shown in Fig. 10. After the sand has been filled in and the press board I) has been placed in position on the sand and pressed as aforesaid and as shown in Fig. 10, the drag side Z Z Z Z of the half mold f therein with the press board 6 and loose metal frame a and the odd side are turned upside-down and then the odd side is lifted off. Now the cope side part m m m m of the snap flask is placed in position on the horizontal flange a of the frame and embracing the vertical flange a of the same, and the sand is now filled in and the top press board is is placed thereon and pressed. Now the cope side part m m m 077. of the snap flask and the drag side part Z Z Z Z of the same can be removed from the two halves e, f of the mold and from the press boards I) is which are then clamped together by the usual clamps such as 7) as in Fig. 11. It will be seen that as the vertical flange a of the frame (0 projects above and below the meeting line cl of the two half molds e, f the frame a supports the sand around the edges where the half molds e f meet and'thus prevents the sand from breaking away as aforesaid where it is thin, and as the corner projections 0 of the frame a also embrace the corners of the half molds e, f the latter are effectually prevented from slipping on one another.

In order to prevent the longitudinal and end corners of the half molds from breaking away from the press boards 6, 7.: and also to prevent the latter from slipping on the half molds e, 7 when the said drag and cope side parts of the snap flask are removed as aforesaid, the press boards Z), are by preference each made with triangle section fillets r projecting from their faces all around their edges (see Fig. 12) so that these fillets 1' embrace the corners of the half molds, e, f and thus prevent them from breaking away and prevent the press boards from slipping on the half molds. I prefer for the light metal frame a or a to have its said projections 0 arranged at the corners as above described, but it will be evident that if desired the frame can without departing from the nature of this invention whether adapted to be fixed to the press board 6 or loose therefrom as above described, be made with projections which are at positions intermediate between the corners and extend across the meeting line of the two half molds and prevent them from slipping on one another as above described with reference to the corner projections o.

What I claim as my invention and desire to secure by Letters Patent is 1. In a snap flask, in combination, means for holding the half molds in engagement with one another, and means extending across the parting of the molds at the corners only thereof for preventing lateral movement of said half molds.

2. In a snap flask, in. combination, press boards adapted to engage the outer faces of the half molds, means operatively engaging said press boards to hold the half molds with their inner faces in engagement, and means for preventing lateral movement of said half molds.

3. In a snap flask, in combination, press boards adapted to engage the outer faces of the half molds, means operatively engaging said press boards to hold the half molds with their inner faces in engagement, and

means secured to one of said press boards for preventing lateral movement of said half molds.

4-. In a snap flask, in combination, press boards adapted to engage the outer faces of the half molds, means operatively engaging said press boards to hold the half molds with their inner faces in engagement, and a frame secured to one of said press boards for preventing lateral movement of said half molds.

5. In a snap flask, in combination, press boards adapted to engage the outer faces of the half molds, means operatively engaging said press boards to hold the half molds with their inner faces in engagement, and a frame secured to one of said press boards, said frame having projections adapted to extend across the parting of the half molds,

whereby lateral movement of said half molds is prevented. I

6. In a snap flask, in combination, press boards to engage the outer faces of the half molds, means operatively engaging said press boards to hold the half molds with their inner facesin engagement, and a frame having projections adapted to extend across the parting of the half molds at the corners only whereby lateral movement of said half molds is prevented.

In testimony whereof I haveosigned my name to this specification in the presence of two subscribing witnesses.

HAROLD CUBLEY.

-Witnesses CHARLES Boswon'rrr KETLEY, BERTHA MATILDA DEELEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

